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Round|Lab Grown|GIA

5.09ct E SI1 Round Lab Grown Diamond

EX • E/SI1 • GIA 2488088636

Certificate GIA 2488088636

Diamond specifications and retailer prices

From HK$11,855 HKD
$1,511 USD
As of October 26, 2026
Save HK$27,463 HKD (70%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: HK$48,879 HKD at Brilliant Earth · As of October 10, 2026
View at Brilliant Earth

About this 5.09ct lab-grown round diamond

This 5.09ct lab-grown round sits in the over five carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2488088636. Listed at 16 retailers as of October 26, 2026, with a 232% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

5.09
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle40.8°
OriginLab Grown
Grading LabGIA
CertificateGIA 2488088636
Dimensions11.07 × 11.02 × 6.77 mm
L/W Ratio1.00
Star length45%
Top View
11.07 mm11.02 mm5.09 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2488088636
Side View
Table 57.0%Crown 34.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.2%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 26
Current: HK$48,879 HKD|Low: HK$11,376 HKD|High: HK$48,879 HKD|Avg: HK$20,814 HKD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
October 31, 2026
Retailer 17HK$11,855 HKD
Retailer 7HK$12,898 HKD
Retailer 9HK$13,267 HKD
Retailer 8HK$13,746 HKD
Retailer 5HK$15,103 HKD
Retailer 11HK$15,767 HKD
Retailer 6HK$16,037 HKD
Retailer 3HK$17,880 HKD
Retailer 12HK$18,296 HKD
Retailer 13HK$19,003 HKD
Retailer 2HK$20,710 HKD
Retailer 16HK$21,670 HKD
Retailer 10HK$21,913 HKD
Retailer 15HK$24,479 HKD
Retailer 4HK$25,773 HKD
Retailer 14HK$39,318 HKD
Brilliant EarthHK$48,879 HKD

36 data points across 17 retailers

16 retailersHK$11,855 HKD to HK$39,318 HKD

B+
Cheapest Retailer
-
HK$11,855 HKD
$1,511 USD
B+
Retailer 2
-
HK$12,898 HKD
$1,644 USD
View
B+
Retailer 3
-
HK$13,746 HKD
$1,752 USD
View
B+
Retailer 4
-
HK$15,103 HKD
$1,925 USD
View
B+
Retailer 5
-
HK$15,767 HKD
View
B+
Retailer 6
-
HK$16,037 HKD
$2,044 USD
View
B
Retailer 7
-
HK$17,880 HKD
$2,279 USD
View
B+
Retailer 8
-
HK$18,296 HKD
£1,836 GBP
View
B+
Retailer 9
-
HK$19,003 HKD
£1,907 GBP
View
B+
Retailer 10
-
HK$20,710 HKD
€2,514 EUR
View
B
Retailer 11
-
HK$21,670 HKD
$2,762 USD
View
B
Retailer 12
-
HK$21,913 HKD
$2,793 USD
View
Retailer 13
-
HK$24,479 HKD
$3,120 USD
View
Price last confirmed 10 days ago
B
Retailer 14
-
HK$25,773 HKD
$3,285 USD
View
B
Retailer 15
-
HK$39,318 HKD
£3,946 GBP
View
Most Expensive
Brilliant Earth
14415260A · Oct 10
HK$48,879 HKD
$6,230 USD
View
Price last confirmed 21 days ago
15 more retailers have this diamond
Prices start from HK$11,855 HKDSave up to HK$27,463 HKD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

B+
5.09ct Round
HK$11,855 HKD